Loom stopping device



A nl 2, 1963 w. M. ATWATER 3,083,740

LOOM STOPPING DEVICE Filed Dec. 5, 1960 3 Sheets-Sheet 1 0 70 cur-or; fur/V045 as I fea O 1 TO RELEASE ARM INVENTOR WILL/AM MARS/MM A7W4TA ATTORNEY A ril 2, 1963 w. M. ATWATER 3,083,740

LOOM STOPPING DEVICE Filed Dec. 5, 1960 3 Sheets-Sheet g TNVENTOR 64 WILL/AM MARSHALL ATWATER 4Q- ATTORNEY April 2, 1963 r w. M. ATWATER 3,083,740

LOOM STOPPING DEVICE Filed Dec. 5, 1960 3 Sheets-Sheet 3 INVENTOR WILLIAM MARSHALL ATWATER BY Q M ATTORNEY hired states The present invention relates to a device for stopping looms, particularly a movement-accumulating device which stops the loom upon failure of the loom moving parts to perform in proper series.

Numerous previous inventors have approached the problem of stopping label, broad or other types of looms in order to avoid a smash, that is, the damaging entanglement of weft threads upon stopping of movement of the woven fabric, while the loom batten continues its packing movement. This problem is most serious in label loom weaving operations, wherein many thousands of warp threads may be employed in a single loom. In label looms ground filler thread is required to be woven sequentially of weaving of colored filler thread and whenever the colored filler thread is not being woven. In label looms the fabric take-up or pick wheel is geared to move only when the ground filler thread is being woven. Thus, if the ground filler thread is broken or, otherwise, fails to weave there is a continual packing" or weaving of the colored filler thread in one place upon the stationary fabric. Earlier inventors such as Lawrushko (1,321,762) and Rockwell (2,599,584) have devised means for stopping such looms, whenever the pick or fabric takeup wheel ceases to move. The present invention comprises a device for stopping of loom action whenever the conventionally white ground or filler thread used in combination with other colored filler threads, fails to be selected for weaving by the loom shuttle selector box. Thus, the present device consists of a loom shut off trap for accumulating batten movements as colored threads are woven into the warp and releasing or tripping this trap Whenever white ground or filler threads are woven into the warp. If the loom shuttle selector box fails to select ground or filler thread according to a predetermined pattern, an eccentric cam attached to the trap kicks a loom stop handle and the loom mechanism is accordingly shut off. This accumulator may be connected directly to the shuttle selector box or to a loom pick wheel which conventionally is rotated upon selection of white ground or filler thread for weaving.

Although spring-urged ratchet means are employed as the accumulating mecianism, it will be apparent that solenoid and other electrical and mechanical accumulating means may be similarly employed.

Accordingly, it is an object of invention to provide a loom stopping device which is actuable upon failure of the loom to weave filler thread.

Another object of invention is to provide a movementaccumulating device for the stopping of looms.

Another object of invention is to provide a movementaccumulating device which is attachable to the shuttle selector box of a loom for tripping of said loom upon failure of the shuttle selector box to select threads for weaving in pro-determined series.

Yet additional objects of invention will become apparent from the ensuing specification and attached drawings, wherein:

FIG. 1 is a front elevation of a floor-mounted loom stopping device lit as attached to loom cut-elf handle, batten and shuttle selection box components;

FiG. 2 is a front elevation of a loom stopping device showing the coaxially mounted ratchet and eccentric cam 76 adjacent the loom cut-off handle 40 with locking pawl 60 engaging ratchet teeth notches 92.;

3,033,?46 Patented Apr. 2, 1963 ice FIG. 3 is a top plan of the device showing the ratchet superposed with respect to the shuttle selector arm movable carriage 52;

FIG. 4 is a vertical section, taken along lines 4-4 of FIG. 2, and showing mounted upon carriage 52 reciprocating pawl 56 and stationary locking pawl 60 pivoted within housing it}. In the attitude shown shuttle selector arm 44 upon selection of white filler thread for weaving has urged stationary pawl 6t} away from the ratchet teeth so as to enable the ratchet to be spring-urged counterclockwise;

PEG. 5 is end elevation of the mechanism showing reciprocating pawl tip 82 directly engaging ratchet teeth 72.

In FIG. 1 housing 16 is shown as positioned upon floor line 20 adjacent loom batten 12, which is reciprocated by arm 38 eccentrically attached to cam 1 mounted upon drive shaft 16. Shuttle selector box 18 is mounted within batten 12 for vertical reciprocation to the positions indicated by phantom lines in FIG. 1, as the variously colored weft threads are slected for weaving. Thus, as various colors are selected for weaving, the shuttle selector box is raised or lowered accordingly so that the appropriate bobbins are positioned adjacent the warp threads (not illustrated) for weaving into the fabric (not illustrated). Batten i2 is mounted upon batten support arms 22 which are pivoted in floor mounted batten base 26. Support arms 22 embody medial slots 24 in which may be pivoted batten movement arm 42 and like members utilizable for translating the batten movement to other areas. Also, as shown in PEG. 1, loom cut-oil control handle 44) is pivoted in housing it? adjacent eccentric cam '76 which is mounted co axially with ratchet 72 upon shaft 74 as shown in F188. 2, 4 and 5. Also, extending from housing Ill is articulated shuttle selector arm 44 attached to bellcrank lever i i mounted on shaft 27. Bellcrank lever 99 is attached to shuttle box arm 28 which, in turn, is attached to the ground or filler thread release box 18. As the shuttle selector box 18 is raised, shuttle selector arm 44 is pivoted. Shuttle shifting arm 88 may be pivoted upon shaft 32. Batten movement arm 42 translates batten movements into the accumulating device within housing iii.

In the remaining figures ratchet '72 embodying teeth 84 and notches 9?, is shown mounted upon shaft 74, and is urged counterclockwise by coil spring means 50. This counterclockwise movement is limited by engagement of longitudinal stopping pin 73 with transversely disposed stud 80. Batten movement bar 42 is pivoted upon shaft '70 within housing it and has pivoted at its lower end carriage 52 including wheel means 54 the travel of which is limited by housing floor incline 68. Within carriage 52 there is mounted reciprocating pawl 56- having a T-shaped tip 82. and being urged by spring 58 against carriage shoulder 94, as shown in FIG. 2. As will be apparent upon reciprocating movement of carriage 52, pawl tip 82 engages ratchet notches SW. and thus turns ratchet '72 clockwise and coaxially mounted cam 76 until the PEG. 4- illustrated position is reached wherein cam 76 abuts control handle 4%} and in turn the loom is stopped. The illustrated ratchet embodies five notches and is thus designed to trip the control handle unless white filler thread is selected by the shuttle box at least every 4 batten cycles. As white filler thread is selected by the appointed shuttle box 18, shuttle bar selector 44 is pivoted so that shuttle bar safety 64 engages stationary locking pawl 60 which may also be pivoted upon shaft 70. Stationary pawl 60 is normally spring urged against ratchet teeth 84 by means of spring 66, and thus prevents counterclockwise movement of the ratchet. As white filler thread is selected for weaving and safety 64 pivots stationary pawl 60 away from ratchet teeth 74 spring 50 is permitted to urge the ratchet counterclockwise until stop 78 abuts stud 8t) and the series of accumulating batten movements may be repeated wherein reciprocating pawl 56 engages ratchet notches 92 until eccentric cam 76 abuts control handle 40.

It will be apparent that arm 44 may also be connected to a pick wheel for releasing stationary pawl tip 62 away from ratchet 72 as the white filler thread is woven and as the pick wheel turns. In this instance, if the pick wheel failed to turn, eccentric cam 76 would be permitted to abut control handle 49 and stop the loom driving mechanism.

As will be apparent, the present device was developed for use with weaving two colors plus a filler in conventional labels. However, by providing a larger ratchet the device might be attachable for stopping looms weaving a greater plurality of colors. Also, of course, solenoid as well as gear reduction means may be employed to accumulate movements of the loom batten or pick Wheel and trip these accumulated movements in accordance with predetermined pattern of weaving without departing from the spirit and scope of the invention as defined in the sub-joined claims.

I claim:

1. A movement-accumulating device for stopping looms of the type having vertically actuable shuttle box comprising a coaxially mounted ratchet and eccentric cam, a reciprocating pawl mounted in said device so as to engage said ratchet and said reciprocating pawl being connected by means to a batten of said loom, a stationary locking pawl pivoted in said device, a release arm interconnecting said locking pawl and said shuttle box, said shuttle selector arm upon command by said shuttle box pivoting said stationary pawl away from said ratchet.

2. A device as in claim 1, said ratchet containing a plurality of notches corresponding to the number of loom weft threads and being spring-urged against cumulative movements by said reciprocating pawl.

3. A movement-accumulating stopping device for looms of the type having a shuttle selector box and a loom batten comprising a housing having an inclined floor, a ratchet and eccentric cam coaxially mounted upon said housing, said ratchet including notches corresponding to the number of loom weft threads, spring means urging said ratchet in one direction, a reciprocating carriage movable about the floor of said housing and including a reciprocating pawl engaging said ratchet notches, said reciprocating carriage being connected to the loom batten and correspondingly moving said ratchet against said spring means in accordance with batten movements, a stationary locking pawl pivoted in said housing and being spring urged against said ratchet so as to prevent movement of said pawl against accumulated batten movements, a release arm pivoted in said device and interconnecting a shuttle selector box of said loom and said stationary locking pawl, said shuttle selector arm upon movement of said release box pivoting said stationary locking pawl away from said ratchet, and a loom stop control handle pivoted in said housing adjacent said cam, said cam urging said control handle to loom stop position upon accumulating a pre-determined number of batten movements.

4. A device as in claim 3, including a stop pin attached to said ratchet and engageable with a laterally disposed stud mounted in said housing, so as to set said ratchet for series engagements with said reciprocating pawl.

5. A device as in claim 4, said release arm being connected to said shuttle selector box so as to pivot said stationary pawl away from said ratchet upon selection of filler thread for weaving.

6. A m0vement-accumulating device for stopping looms comprising a coaxially mounted ratchet and eccentric cam; a reciprocating pawl connected to a moving part of said loom and moving said ratchet and said cam correspondingly with said moving part; a lever supported in said device adjacent said eccentric cam and attached to the loom stop handle; a stationary locking pawl supported in said device adjacent said ratchet, said stationary locking pawl being operably connected to ashuttle box and being pivotable away from said ratchet upon movement by said shuttle box and resilient means urging said cam against said locking pawl and said reciprocating pawl.

References Cited in the file of this patent UNITED STATES PATENTS 

1. A MOVEMENT-ACCUMULATING DEVICE FOR STOPPING LOOMS OF THE TYPE HAVING VERTICALLY ACTUABLE SHUTTLE BOX COMPRISING A COAXIALLY MOUNTED RATCHET AND ECCENTRIC CAM, A RECIPROCATING PAWL MOUNTED IN SAID DEVICE SO AS TO ENGAGE SAID RATCHET AND SAID RECIPROCATING PAWL BEING CONNECTED BY MEANS TO A BATTEN OF SAID LOOM, A STATIONARY LOCKING PAWL PIVOTED IN SAID DEVICE, A RELEASE ARM INTERCONNECTING SAID LOCKING PAWL AND SAID SHUTTLE BOX, SAID SHUTTLE SELECTOR ARM UPON COMMAND BY SAID SHUTTLE BOX PIVOTING SAID STATIONARY PAWL AWAY FROM SAID RATCHET. 